Voir la notice de l'article provenant de la source Proyecto DML-E: Biblioteca Digital de Matemáticas
@article{CLTM_1973_1973_1_a11, author = {Crofts, G.}, title = {A {Generalization} of {Echelon} {Spaces.}}, journal = {Collectanea mathematica}, pages = {139-149}, publisher = {mathdoc}, volume = {24}, number = {2}, year = {1973}, zbl = {0305.46021}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CLTM_1973_1973_1_a11/} }
Crofts, G. A Generalization of Echelon Spaces.. Collectanea mathematica, Tome 24 (1973) no. 2. http://geodesic.mathdoc.fr/item/CLTM_1973_1973_1_a11/